I have a XT6 trubo (Auto) and have had the stalling issue for 2-years. Happenes about once a month, when I pull up at a set of lights. car drops revs & stalls (no shudder). kinda creepy how quietly it does it LOL It has been back to 3 different ford dealers, who ALL "upgrade" the software and the problem goes away HOWEVER, the car then idles at 1,300 rpm, so back it goes, they un-do & I'm back with the annoyance of stalls. 2-months to go before warranty ends, then its to TUNEHOUSE !!!!